Patricia of End is the princess of the Netherworld, a realm for the deceased, tasked with eradicating surface life. Arriving in the coastal town of Sakuragabuchi, she collapses from severe illness caused by exposure to the surface world's abundant life energy, forcing her to rely on protagonist Nora Handa.

She possesses blonde hair styled in shoulder-length twin tails, violet eyes, and stands 165 cm tall, with figure measurements of 89 cm (bust), 56 cm (waist), and 85 cm (hips). Her birthday is December 31. An accidental kiss shared with Nora transforms him into a black cat and magically compels him to serve her.

Patricia initially exhibits the arrogance and refined demeanor befitting her royal status. However, she also displays significant curiosity and ignorance about the surface world. This drives her to explore surface legends, customs, and unfamiliar objects, like an adult book Nora must explain to her. Her demeanor can shift towards a more relaxed or "deredere" state in certain situations, and she has recently been observed reading picture books to neighborhood children.

She belongs to the Netherworld royal family, positioned as the middle sister between elder sister Lucia and younger sister Euracia. Their mother is the Queen of the Netherworld, residing in the underworld castle. Patricia transfers into Sakuragabuchi Academy alongside her sisters.

Her core role as the Netherworld Princess adjusting to surface life while bound to Nora through the cat transformation curse remains consistent across media. The anime adaptation depicts her involvement in various comedic and chaotic episodic events alongside other characters. She appears in the sequel visual novel *Nora, Princess, and Crying Cat*.